diff --git a/server/gameserver/roomobstacle.cc b/server/gameserver/roomobstacle.cc
index af8a9ec..5034479 100644
--- a/server/gameserver/roomobstacle.cc
+++ b/server/gameserver/roomobstacle.cc
@@ -183,14 +183,16 @@ void RoomObstacle::SpecExplosion()
         bomb_born_offset.Rotate(a8::RandAngle());
         bomb_born_offset = bomb_born_offset * a8::RandEx(1, std::max(2, meta->i->explosion_float()));
         a8::Vec2 bomb_pos = GetPos() + bomb_born_offset;
-        Explosion explosion;
-        explosion.IndifferenceAttack(
-                                     room,
-                                     bomb_pos,
-                                     meta->i->damage_dia(),
-                                     meta->i->explosion_effect(),
-                                     meta->i->damage()
-                                     );
+        if (room->grid_service->CanAdd(bomb_pos.x, bomb_pos.y)) {
+            Explosion explosion;
+            explosion.IndifferenceAttack(
+                                         room,
+                                         bomb_pos,
+                                         meta->i->damage_dia(),
+                                         meta->i->explosion_effect(),
+                                         meta->i->damage()
+                                         );
+        }
     }
     if (explosion_times_ >= meta->i->explosion_times()) {
         room->xtimer.DeleteTimer(room->xtimer.GetRunningTimer());